The benefit of using the class limiting plugins is that you can allow certain classes more players once you reach the 10 player mark. Our server allows an additional soldier at 10, engineer at 11, and scout at 12.

The way I have played highlander (possible idea of expansion of this plugin) is that when the map starts, everyone starts in spec, then two captains are chosen, then it decides who get first pick.

Whoever gets first pick then chooses what class to pick first, then its announced what class, then everyone who wants that class says something to let him know, then the captain picks, then the next captain picks and chooses the next class. this goes on until the teams are filled. Once filled, the round is restarted, and things start going.